ref: 80f9a5784376aacb9b703a4d6ff49b6e28efa285
parent: daa8482fa71fc744e2153cec3c6ef337064ef882
parent: 10fb9b94f4ca5df111b6a861141a18d436eff197
author: Jerome Jiang <jianj@google.com>
date: Fri Aug 17 03:02:29 EDT 2018
Merge "Refactor some swapping code with a local func."